diff --git a/src/renderer/wg_engine/tvgWgBindGroups.cpp b/src/renderer/wg_engine/tvgWgBindGroups.cpp
index 8c9d14df..e25e4181 100644
--- a/src/renderer/wg_engine/tvgWgBindGroups.cpp
+++ b/src/renderer/wg_engine/tvgWgBindGroups.cpp
@@ -141,6 +141,7 @@ void WgBindGroupLayouts::releaseBindGroup(WGPUBindGroup& bindGroup)
     bindGroup = nullptr;
 }
 
+
 void WgBindGroupLayouts::releaseBindGroupLayout(WGPUBindGroupLayout& bindGroupLayout)
 {
     if (bindGroupLayout) wgpuBindGroupLayoutRelease(bindGroupLayout);
@@ -160,7 +161,6 @@ void WgBindGroupLayouts::initialize(WGPUDevice device)
     const WGPUSamplerBindingLayout sampler = { .type = WGPUSamplerBindingType_Filtering };
     const WGPUTextureBindingLayout texture = { .sampleType = WGPUTextureSampleType_Float, .viewDimension = WGPUTextureViewDimension_2D };
     const WGPUStorageTextureBindingLayout storageTextureWO { .access = WGPUStorageTextureAccess_WriteOnly, .format = WGPUTextureFormat_RGBA8Unorm, .viewDimension = WGPUTextureViewDimension_2D };
-    const WGPUStorageTextureBindingLayout storageTextureRO { .access = WGPUStorageTextureAccess_ReadOnly,  .format = WGPUTextureFormat_RGBA8Unorm, .viewDimension = WGPUTextureViewDimension_2D };
     const WGPUBufferBindingLayout bufferUniform { .type = WGPUBufferBindingType_Uniform };
 
     // bind group layout tex sampled with buffer uniforms
@@ -190,9 +190,9 @@ void WgBindGroupLayouts::initialize(WGPUDevice device)
 
     // bind group layout tex storages RO
     const WGPUBindGroupLayoutEntry entriesTexStoragesRO[] {
-        { .binding = 0, .visibility = visibility_frag, .storageTexture = storageTextureRO },
-        { .binding = 1, .visibility = visibility_frag, .storageTexture = storageTextureRO },
-        { .binding = 2, .visibility = visibility_frag, .storageTexture = storageTextureRO }
+        { .binding = 0, .visibility = visibility_frag, .texture = texture },
+        { .binding = 1, .visibility = visibility_frag, .texture = texture },
+        { .binding = 2, .visibility = visibility_frag, .texture = texture }
     };
     const WGPUBindGroupLayoutDescriptor layoutDescTexStorages1RO { .entryCount = 1, .entries = entriesTexStoragesRO };
     const WGPUBindGroupLayoutDescriptor layoutDescTexStorages2RO { .entryCount = 2, .entries = entriesTexStoragesRO };
diff --git a/src/renderer/wg_engine/tvgWgBindGroups.h b/src/renderer/wg_engine/tvgWgBindGroups.h
index 11399f80..9bab0e77 100644
--- a/src/renderer/wg_engine/tvgWgBindGroups.h
+++ b/src/renderer/wg_engine/tvgWgBindGroups.h
@@ -44,6 +44,7 @@ public:
     WGPUBindGroup createBindGroupTexSampledBuff1Un(WGPUSampler sampler, WGPUTextureView texView, WGPUBuffer buff);
     WGPUBindGroup createBindGroupTexSampledBuff2Un(WGPUSampler sampler, WGPUTextureView texView, WGPUBuffer buff0, WGPUBuffer buff1);
     WGPUBindGroup createBindGroupStrorage1WO(WGPUTextureView texView);
+    // for read-only access in compute shaders, use texture_2d<f32> instead of texture_storage_2d<rgba8unorm, read>
     WGPUBindGroup createBindGroupStrorage1RO(WGPUTextureView texView);
     WGPUBindGroup createBindGroupStrorage2RO(WGPUTextureView texView0, WGPUTextureView texView1);
     WGPUBindGroup createBindGroupStrorage3RO(WGPUTextureView texView0, WGPUTextureView texView1, WGPUTextureView texView2);
diff --git a/src/renderer/wg_engine/tvgWgShaderSrc.cpp b/src/renderer/wg_engine/tvgWgShaderSrc.cpp
index 1e53d961..53fa134a 100644
--- a/src/renderer/wg_engine/tvgWgShaderSrc.cpp
+++ b/src/renderer/wg_engine/tvgWgShaderSrc.cpp
@@ -709,7 +709,7 @@ fn fs_main(in: VertexOutput) -> @location(0) vec4f {
 //************************************************************************
 
 const char* cShaderSrc_GaussianBlur = R"(
-@group(0) @binding(0) var imageSrc : texture_storage_2d<rgba8unorm, read>;
+@group(0) @binding(0) var imageSrc : texture_2d<f32>;
 @group(1) @binding(0) var imageDst : texture_storage_2d<rgba8unorm, write>;
 @group(2) @binding(0) var<uniform> settings: array<vec4f, 3>;
 @group(3) @binding(0) var<uniform> viewport: vec4f;
@@ -743,9 +743,9 @@ fn cs_main_horz(@builtin(global_invocation_id) gid: vec3u,
     let iid = vec2i(uid);
 
     // load source to local workgroup memory
-    buff[lid.x + N*0] = textureLoad(imageSrc, uid - vec2u(N, 0));
-    buff[lid.x + N*1] = textureLoad(imageSrc, uid + vec2u(0, 0));
-    buff[lid.x + N*2] = textureLoad(imageSrc, uid + vec2u(N, 0));
+    buff[lid.x + N*0] = textureLoad(imageSrc, uid - vec2u(N, 0), 0);
+    buff[lid.x + N*1] = textureLoad(imageSrc, uid + vec2u(0, 0), 0);
+    buff[lid.x + N*2] = textureLoad(imageSrc, uid + vec2u(N, 0), 0);
     workgroupBarrier();
 
     // apply filter
@@ -786,9 +786,9 @@ fn cs_main_vert(@builtin(global_invocation_id) gid: vec3u,
     let iid = vec2i(uid);
 
     // load source to local workgroup memory
-    buff[lid.y + N*0] = textureLoad(imageSrc, uid - vec2u(0, N));
-    buff[lid.y + N*1] = textureLoad(imageSrc, uid + vec2u(0, 0));
-    buff[lid.y + N*2] = textureLoad(imageSrc, uid + vec2u(0, N));
+    buff[lid.y + N*0] = textureLoad(imageSrc, uid - vec2u(0, N), 0);
+    buff[lid.y + N*1] = textureLoad(imageSrc, uid + vec2u(0, 0), 0);
+    buff[lid.y + N*2] = textureLoad(imageSrc, uid + vec2u(0, N), 0);
     workgroupBarrier();
 
     // apply filter
@@ -812,8 +812,8 @@ fn cs_main_vert(@builtin(global_invocation_id) gid: vec3u,
 )";
 
 const char* cShaderSrc_Effects = R"(
-@group(0) @binding(0) var imageSrc : texture_storage_2d<rgba8unorm, read>;
-@group(0) @binding(1) var imageSdw : texture_storage_2d<rgba8unorm, read>;
+@group(0) @binding(0) var imageSrc : texture_2d<f32>;
+@group(0) @binding(1) var imageSdw : texture_2d<f32>;
 @group(1) @binding(0) var imageTrg : texture_storage_2d<rgba8unorm, write>;
 @group(2) @binding(0) var<uniform> settings: array<vec4f, 3>;
 @group(3) @binding(0) var<uniform> viewport: vec4f;
@@ -829,8 +829,8 @@ fn cs_main_drop_shadow(@builtin(global_invocation_id) gid: vec3u) {
     let uid = gid.xy + vmin;
     let oid = clamp(vec2u(vec2i(uid) - voff), vmin, vmax);
 
-    let orig = textureLoad(imageSrc, uid);
-    let blur = textureLoad(imageSdw, oid);
+    let orig = textureLoad(imageSrc, uid, 0);
+    let blur = textureLoad(imageSdw, oid, 0);
     let shad = settings[1] * blur.a;
     let color = orig + shad * (1.0 - orig.a);
     textureStore(imageTrg, uid.xy, color);
@@ -845,7 +845,7 @@ fn cs_main_fill(@builtin(global_invocation_id) gid: vec3u) {
     // tex coord
     let uid = min(gid.xy + vmin, vmax);
 
-    let orig = textureLoad(imageSrc, uid);
+    let orig = textureLoad(imageSrc, uid, 0);
     let fill = settings[0];
     let color = fill * orig.a * fill.a;
     textureStore(imageTrg, uid.xy, color);
@@ -860,7 +860,7 @@ fn cs_main_tint(@builtin(global_invocation_id) gid: vec3u) {
     // tex coord
     let uid = min(gid.xy + vmin, vmax);
 
-    let orig = textureLoad(imageSrc, uid);
+    let orig = textureLoad(imageSrc, uid, 0);
     let luma: f32 = dot(orig.rgb, vec3f(0.2125, 0.7154, 0.0721));
     let black = settings[0];
     let white = settings[1];
@@ -878,7 +878,7 @@ fn cs_main_tritone(@builtin(global_invocation_id) gid: vec3u) {
     // tex coord
     let uid = min(gid.xy + vmin, vmax);
 
-    let orig = textureLoad(imageSrc, uid);
+    let orig = textureLoad(imageSrc, uid, 0);
     let luma: f32 = dot(orig.rgb, vec3f(0.2125, 0.7154, 0.0721));
     let shadow = settings[0];
     let midtone = settings[1];